The potential use of recycled polyethylene terephthalate (RPET) plastic waste in asphalt binder
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International Journal of Pavement Research and Technology Journal homepage: www.springer.com/42947
The potential use of recycled polyethylene terephthalate (RPET) plastic waste in asphalt binder Musab Abuaddousa, Madhar M. Taamneha*, Samer R. Rabab’ahb Civil Engineering Department, Yarmouk University, P.O. Box 566, Irbid 21163, Jordan Civil Engineering Department, Jordan University of Science and Technology, P.O. Box 3030, Irbid 2210, Jordan Received 23 April 2020; received in revised form 1 November 2020; accepted 3 November 2020
Abstract
The current study aims to examine the potential use of recycled polyethylene terephthalate (RPET) plastic waste as a modifier for asphalt binder. Plastic bottles were collected, shredded, cleaned, melted, ground, then sieved. An asphalt binder with a penet ration grade of 60/70 was used. The RPET plastic waste was blended with 60/70 penetration grade asphalt binder at five percentages (0, 5, 10, 15, and 20 %, by weight of aspha lt binder) using a high shear mixer. To study the physical and mechanical properties of RPET-modified asphalt binders, both traditional and Super pave tests were conducted. The test results showed that by incorporating RPET into asphalt binder, the ductility and penetration values decreased, whereas the so ftening point and viscosity of asphalt binder increased. Furthermore, the rutting performance of RPET-modified asphalt binder, as presented by the rutting parameter (G*/sinδ), was enhanced by increasing the amount of RPET plastic waste at all testing temperatures. The high-temperature performance grade of asphalt binder was raised by one grade (from 64ºC to 70ºC) by adding 15% and 20% of RPET plastic waste. On the other hand, the low-temperature performance of asphalt binder, as presented by creep stiffness and m-value, was negatively affected by adding RPET. The low-temperature performance grade of asphalt binder was dropped by one grade (from -22ºC to -16ºC) by adding RPET plastic waste at percentages of 15 % and 20 %. Moreover, the fatigue cracking performance of asphalt binder, as presented by the fatigue parameter (G*.sinδ), was slightly reduced by adding RPET to the asphalt binder but remained lower than the acceptable Super pave limit (≤ 5000 kPa). Keywords: Asphalt binder; PET; Plastic waste; Rutting; Fatigue
Introduction 1.1. Background Over the past few years, the use of plastic in multiple industries has expeditiously increased due to the ability to modify it in different forms. Plastic is used for isolating electric wires, construction materials, and food and beverage packaging. However, plastic is a non-biodegradable material and has dire consequences on the environment worldwide [1,2]. To date, traditional plastic recycling methods can only process a fraction of countries' yearly waste [3-6]. This, in turn, has increased the urge to infiltrate plastic waste in multiple industries such as energy [710] and construction materials [11-14] in order to manage excessive waste.
* Corresponding author E-mail addresses: [email protected] (M
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